Problem with system password and application

[cool11]

I 've installed an application in my mac. Now that I try to run it I see this window, asking me for system credentials.
http://a.imageshack.us/img85/594/systemg.jpg

I 've given my admin password many times in many installations. But I never used the system keychain. In fact, I give 'admin' as username, and my computer password, and it is not accepted!
So, the application do not run. Additionally I discovered that there is system password that I do not even know.

Can you help me find out what is going on with this password and finally run the application?

 

[slpdLoad]

Err, well...What application is this? When exactly does this window appear?

That looks a bit fishy, or at least made by a program that is poorly coded. Please post a picture of the window after expanding the "Details" option.

Also, putting "admin" in the username box does not work in OS X. You can only enter full or short names of users on the machine who are admins of the machine.

Yes, there is a "root" mode/user, but that shouldn't come in to play here or be needed.

 

[cool11]

The program is the 'launch2net' which connects mac with several modems to internet.
http://a.imageshack.us/img210/9458/system2.jpg

 

[slpdLoad]

That should be alright.

So if you enter your username (not "admin") and password, and then click "Always Allow", does it work? Are you an admin on the machine?

 

[cool11]

That should be alright.

So if you enter your username (not "admin") and password, and then click "Always Allow", does it work? Are you an admin on the machine?

I am not having any username. I just have a password at boot login.
So, what is supposed to be my username???
One man, one machine, no lan, no multiuser environment.

 

[slpdLoad]

Go to the menu, select System Preferences, and then click on Accounts.

What is the name of your account in the left-hand column? That should be your username.